U.S. Navy Seabees setup MK-19 grenade launchers during a crew-served weapons qualification. U.S. Navy Seabees with Naval Mobile Construction Battalion 5 setup MK-19 grenade launchers during a crew-served weapons qualification range at Camp Leatherneck, Helmand province, Afghanistan, on Oct. 16, 2010. The battalion was deployed to Afghanistan to execute general engineering, infrastructure construction and project management in support of Operation Enduring Freedom. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 277062-S-FNA43-031.jpg Photo Gallery